Loom shuttle check



y 26,v 1936. J N ORTHROP 2,042,139

LOOM SHUTTLE @HECK I NVEN TOR. g/O/VAJ /VOETHEO/ ATTORNEY.

D... O R H T R O N J LOOM SHUTTLE CHECK Filed Febfl, 1965 2 Sheets-Sheet2 INVENTOR.

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Patented May 26, 1936 ECE LOOM SHUTTLE CHECK Jonas Northrop, Hopedale,Mass., assignor to Draper Corporation, Hopedale, Mass., a corporation ofMaine Application February 15, 1935, Serial No. 6,729

2 Claims;

The present invention pertains to loom shuttle boxes and moreparticularly relates to the shuttle checking means thereof.

It has been proposed heretofore to provide loom shuttle boxes having abinder with supplemental checking means comprised of a weight elementwhich is slidably mounted for engagement directly by the incomingshuttle. Such construction is objectionable in that the binder must beshortened, and therefore rendered less satisfactory, in order to provideroom for the sliding weight, and further in that a weight element actingdirectly upon the shuttle must be unduly bulky and heavy.

I propose to provide a shuttle box having a binder and supplementalchecking means comprised of a weight element which is actuated by alever pivoted in the shuttle box and directly engaged by the incomingshuttle. In the preferreclv form of the invention, the lever mentionedis pivoted at the outer end of the shuttle box on the same axis as thebinder and is connected to actuate a weight element in the form of alever having a long but comparatively light weight arm.

The said preferred embodiment is illustrated on the accompanyingdrawings, of which:

Fig. 1 is a plan view of the left hand shuttle box and check;

Fig. 2 is a view similar to Fig. 1 but showing the shuttle fully enteredinto the box;

Fig. 3 is a rear elevation;

Fig. 4 is a horizontal sectional view taken approximately on line 4 4 ofFig. 3;

Fig. 5 is a view similar to Fig. 1 but showing the shuttle partiallyentered into the box; and

Fig. 6 is an end elevation of the shuttle box and check.

The loom lay I shown on the drawings is of conventional design, it beingmounted on lay swords as 2 for reciprocation toward and from the frontof the loom in the usual manner. The lay may be pro-vided at each endwith a shuttle box, the shuttle 3 being picked back and forth along thelay, from one shuttle box to the other, by means of picker sticks, as 4.Only one of the shuttle boxes is shown, that one being at the left handend of the lay, which is at the left side of the loom.

The shuttle box includes a front box plate 5, a back box plate 6 and afloor l, the shuttle box opening inwardly, which is toward the right,Fig. 1, and being, in effect closed at its outer or left hand end by thepicker stick. The inner end of the back box plate is bolted to the swordat 8 and the outer end is bolted to the lay as by a vertical bolt 9which is vsecured tothe lay.

The shuttle box is provided with a binder I0 Which, in the presentinstance is pivoted at its outer end on the bolt 9. The binder isyieldingly actuated by a. spring Il and is provided on its front facewith friction material I2 whereby it is adapted to frictionally resistmovement of the shuttle. The binder of the present invention differsfunctionally from the binders more commonly used heretofore, the presentbinder being actuated by a 'very light spring so as to only partiallycheck the shuttle as the latter enters the shuttle box, the springaction and the resulting friction on the incoming shuttle being,however, constant irrespective of the velocity of the shuttle, as isusual.

The present invention provides meanswhich by reason of its inertia isadapted to further check the shuttle independently of the binder afterthe shuttle has been partially checkedby the binder. Such means iscomprised of a lever which has one arm projecting into the shuttle boxto be directlyengaged and actuated by the shuttle, and a weight velementconnected with the other arm of the lever to oppose movement of thelatter by the incoming shuttle.

The lever mentioned may assume various forms, the lever I3 shown on thedrawings being of bell crank form and pivoted intermediate its ends onthe same axis as the binder, i. e. on the bolt 9 at the outer end of theshuttle box. One arm I4 of the lever projects longitudinally of theshuttle box and extends into the same. This arm is provided on its innerend with an upturned end i5 which may be faced with friction materialand which is in position to be di- 'rectly engaged and moved laterallyby the incoming shuttle. The binder face may be recessed as at I6 toaccommodate the up-turned end of the lever in position for the latter tobe engaged by the side of the rounded point of the shuttle.

The other arm Il of the lever projects rearwardly, laterally of the rstarm, and is connected with the weight element I8 in such manner that thelatter urges the arm Il inwardly of the loom, thus tending to hold thelever arm I4 forwardly in the shuttle box. Adjustable stop means, as setscrew I9, engages the arm I'I to limit the extent to which the shuttleengaging arm I4 projects into the shuttle box. It will be apparent thatadjustment of the screw I9 will serve to vary the time of engagement ofthe shuttle with the lever I3 and will also Vary the extent of thevantageous.

movement of the lever by the shuttle, thereby varying the checkingaction of the lever and weight element.

The weighi-l element I8 may be variously contrived, but I have devised,and the drawings show, a form of such element which isv particularly ad-The element Aas shown in comprised of abell crank lever which is pivotedon a horizontal bolt 20 in the'bracket 2| on the lay, the bolt beingadjacent the outer end of the lay whereby the arm 22 which engages thearm I1 may be relatively short. The second arm 23 of the element I8 isrelatively long, the same projecting downwardly and inwardly along theback of the lay and having a part'24 which extends longitudinally of thelay therebeneath as is more clearly shown by Figs. Sand 6. The arm 23 istherweighted arm of'the element,` although the relative lengths of thearms of this lever and of the lever I3 are such that excessive weight isnot required even at very high loom speeds.

The horizontal part 24 of the .arm 23 may be 'apertured to receive aguide post 25 which projects downwardly from bracket 2I on Vthe lay.

A stop screw 26 is carried by the part 2liv withthe head of the screwprojecting upwardly. The

vscrew, may-be adjusted to strike the bracket l2I Y at the end of theupward movement of the arm 23, thereby providing means rfor positivelychecking the kshuttle under certain abnormal condif The operation ofthe. device willl be lobvious* from the foregoing description. Whentheshuttle is absentfrom the box, itbeing at the Aother side of the loomor in\flight, rthe parts assume the positions shown more clearly byFigs.'

l and 3. Then, as., the shuttle enters the shuttle box it will firstmove, and be partially checked by,

the binder as represented by Fig. 5 and willV thereafterbe fully checkedin the position shown weight of the weighted element oppose movement ofthe lever I3 by the incoming shuttle. The construction is such that, asis apparent, it checks the incoming shuttle quite effectively but oiersmuch less resistance to the picking of the shuttle out of the box.

Having fully disclosed the preferred embodiment of the invention, Iclaim:

1. In a loom, a lay, a shuttle, a shuttle box carried by saidlay; abinder pivoted at its outer end and yieldingly actuated to partiallycheck said shuttle as the latter enters said shuttle box,

a bell crank lever pivoted on the same axis as said binder and havingone arm projecting longitudinally of said shuttle box in position to beengaged and moved laterally of said lay by the incoming shuttle afterthe latter has been partially checked by said binder, adjustable stopmeans engaging said lever for limiting the extent to which said armprojects into said shuttle box, and a weight element connected with theother arm of said lever to oppose said movement of the lever by saidincoming shuttle.

2. In a loom, a lay, a shuttle, a shuttle box carried by said lay, ayieldingly actuated binder having-constant frictional engagement with anincoming shuttle for partially checking the latter asV it; enters saidshuttle box, and additional checking means acting independently of saidbinderv and comprising a lever pivoted on a vertical axis adjacent theouterend of said shuttle box `and-having one arm projectinglongitudinally ofsaid lay; into said shuttle box in position to bedirectly engaged and moved by the incoming shuttle afterrthe latter hasbeen partially checked byg'saidbinder, said lever having another armwhich extends vlaterally of the Ai'lrst said arm, and aweight elementcomprised of a bell crank lever having one arm engaging said laterallyextending arm, said bell Vcrank lever having a weighted arm lever by theincoming shuttle.

JONAS NoRTHRoP.

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